Jen, basically he is saying... "he's not coping as well as maybe he thinks he is with the extra stress and load." This isn't an excuse for him to avoid it, or negate it, simply the stress from getting out of bed in the morning, to being somewhere on time, to dealing with people all day, then coming home, etc etc etc.... is to much for his cup at present. He hasn't dealt with enough, nor healed enough to deal with this type of daily stress and then be personable at the end of the day. The issue also continues, it snowballs, day to day... as with those who don't have PTSD, sleep generally reduces a persons stress by morning and they are refreshed, though it doesn't work that way for a PTSD sufferer, likely they have reduced some, though built up or made up more over-night during their sleep.